IBM DS8880 Series, Introduction And Planning Manual

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your use of local or remote power controls. When you set the switch to
local, the local power on/local force power off switch controls power for
the storage system. You can access this switch by opening the rear cover of
the storage system. When the local/remote switch is set to remote, the
power for the storage system is controlled by remote power control
settings that are entered in the DS8000 Storage Management GUI or DS
Service GUI.
Planning requirements: None.
Local power on/local force power off switch
(Available on base frames) The local power on/local force power off switch
initiates a storage system power-on sequence or a storage system force
power off sequence. This switch is applicable only when the local/remote
switch is set to local. You can access this switch by opening the rear cover
of the storage system.
Planning requirements: None.
DC-UPS circuit breaker switches
Each DC-UPS provides a circuit breaker switch which can be used to
remove connection to input line cord and output power of that DC-UPS. If
both DC-UPS circuit breakers are switched off all power is removed from
the rack immediately.
Attention: These switches are to be used only in specific service actions
or in case of emergency. Switching both DC-UPS circuit breakers off in a
rack can result in loss of data.
The following power controls can be configured by a technical service
representative. You can also use the following power controls through the DS8000
Storage Management GUI (running on the management console):
Local power control mode
(Visible in the DS8000 Storage Management GUI) You cannot change this
setting in the DS8000 Storage Management GUI. This mode is enabled
when the local/remote switch that is on the storage system is in the local
position. When this setting is used, the local power on/local force
power-off switch that is on the storage system controls the power.
Planning requirements:
None.
Power outlet requirements
Plan for the required power outlets for the installation of your storage system.
The following power outlets are required:
v Two independent power outlets for the two power cords that are needed by
each model.
Important: To eliminate a single point of failure, independent power feeds to
each DS8000 power supply are required. At least one of the feeds should have
power conditioning to ensure an acceptable level of power quality as specified
in standards such as ANSI C84.1 and EN 50160. Further, each power source
must have its own wall circuit breaker.
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DS8880 Introduction and Planning Guide